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		<title>three.js - geometry - minecraft</title>
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		<div id="container"><br /><br /><br /><br /><br />Generating world...</div>
		<div id="info"><a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> - <a href="http://www.minecraft.net/" target="_blank">minecraft</a> demo. featuring <a href="http://painterlypack.net/" target="_blank">painterly pack</a><br />(left click: forward, right click: backward)</div>

		<script type="text/javascript" src="js/Stats.js"></script>
		<script type="text/javascript" src="js/ImprovedNoise.js"></script>

		<script type="text/javascript" src="../build/Three.js"></script>
		<script type="text/javascript" src="../src/extras/GeometryUtils.js"></script>
		<script type="text/javascript" src="../src/extras/primitives/Cube.js"></script>

		<script type="text/javascript">

			var container, stats;

			var camera, scene, renderer;

			var mesh;

			var worldWidth = 128, worldDepth = 128,
			worldHalfWidth = worldWidth / 2, worldHalfDepth = worldDepth / 2,
			data = generateHeight( worldWidth, worldDepth );

			var mouseX = 0, mouseY = 0,
			lat = 0, lon = 0, phy = 0, theta = 0;

			var direction = new THREE.Vector3(),
			moveForward = false, moveBackward = false;

			var windowHalfX = window.innerWidth / 2;
			var windowHalfY = window.innerHeight / 2;


			init();
			setInterval( loop, 1000 / 60 );


			function init() {

				container = document.getElementById( 'container' );

				camera = new THREE.Camera( 60, window.innerWidth / window.innerHeight, 1, 20000 );
				camera.target.position.z = - 100;

				scene = new THREE.Scene();

				var grass_dirt = loadTexture( 'textures/minecraft/grass_dirt.png' ),
					grass 	   = loadTexture( 'textures/minecraft/grass.png' ),
					dirt	   = loadTexture( 'textures/minecraft/dirt.png' );

				var materials = [

					grass_dirt, // right
					grass_dirt, // left
					grass, 		// top
					dirt, 		// bottom
					grass_dirt, // back
					grass_dirt 	// front

				];

				var h, h2, px, nx, pz, nz, cubes = [];

				for ( var i = 0; i < 16; i++ ) {

					px = (i & 8) == 8;
					nx = (i & 4) == 4;
					pz = (i & 2) == 2;
					nz = (i & 1) == 1;
					cubes[ i ] = new Cube( 100, 100, 100, 1, 1, materials, false, { px: px, nx: nx, py: true, ny: false, pz: pz, nz: nz } );

				}

				var geometry = new THREE.Geometry();

				camera.position.y = getY( worldHalfWidth, worldHalfDepth ) * 100 + 100;
				camera.target.position.y = camera.position.y;

				for ( var z = 0; z < worldDepth; z ++ ) {

					for ( var x = 0; x < worldWidth; x ++ ) {

						px = nx = pz = nz = 0;

						h = getY( x, z );

						h2 = getY( x - 1, z );
						px = ( h2 != h && h2 != h + 1 ) || x == 0 ? 1 : 0;

						h2 = getY( x + 1, z );
						nx = ( h2 != h && h2 != h + 1 ) || x == worldWidth - 1 ? 1 : 0;

						h2 = getY( x, z + 1 );
						pz = ( h2 != h && h2 != h + 1 ) || z == worldDepth - 1 ? 1 : 0;

						h2 = getY( x, z - 1 );
						nz = ( h2 != h && h2 != h + 1 ) || z == 0 ? 1 : 0;

						mesh = new THREE.Mesh( cubes[ px * 8 + nx * 4 + pz * 2 + nz ] );

						mesh.position.x = x * 100 - worldHalfWidth * 100;
						mesh.position.y = h * 100;
						mesh.position.z = z * 100 - worldHalfDepth * 100;

						GeometryUtils.merge( geometry, mesh );

					}

				}

				geometry.sortFacesByMaterial();

				mesh = new THREE.Mesh( geometry, new THREE.MeshFaceMaterial() );
				scene.addObject( mesh );

				var ambientLight = new THREE.AmbientLight( 0xcccccc );
				scene.addLight( ambientLight );

				var directionalLight = new THREE.DirectionalLight( 0xffffff, 1.5 );
				directionalLight.position.x = 1;
				directionalLight.position.y = 1;
				directionalLight.position.z = 0.5;
				directionalLight.position.normalize();
				scene.addLight( directionalLight );

				renderer = new THREE.WebGLRenderer();
				renderer.setSize( window.innerWidth, window.innerHeight );

				container.innerHTML = "";

				container.appendChild( renderer.domElement );

				stats = new Stats();
				stats.domElement.style.position = 'absolute';
				stats.domElement.style.top = '0px';
				container.appendChild( stats.domElement );

				document.addEventListener( 'mousedown', onDocumentMouseDown, false );
				document.addEventListener( 'mouseup', onDocumentMouseUp, false );
				document.addEventListener( 'mousemove', onDocumentMouseMove, false );
				document.addEventListener( 'contextmenu', function ( event ) { event.preventDefault(); }, false );

				document.addEventListener( 'keydown', onDocumentKeyDown, false );
				document.addEventListener( 'keyup', onDocumentKeyUp, false );

			}

			function generateAO( image, sides ) {

				var c = document.createElement('canvas');
				c.width = image.width;
				c.height = image.height;
				c.getContext( "2d" ).drawImage( image, 0, 0 );

				return c;

			}

			function loadTexture( path ) {

				var image = new Image();
				image.onload = function () { this.loaded = true; };
				image.src = path;

				return new THREE.MeshLambertMaterial( { map: new THREE.Texture( image, new THREE.UVMapping(), THREE.ClampToEdgeWrapping, THREE.ClampToEdgeWrapping, THREE.NearestFilter, THREE.LinearMipMapLinearFilter ) } );

			}

			function generateHeight( width, height ) {

				var data = [], perlin = new ImprovedNoise(),
				size = width * height, quality = 2, z = Math.random() * 100;

				for ( var j = 0; j < 4; j ++ ) {

					if ( j == 0 ) for ( var i = 0; i < size; i ++ ) data[ i ] = 0;

					for ( var i = 0; i < size; i ++ ) {

						var x = i % width, y = ~~ ( i / width );
						data[ i ] += perlin.noise( x / quality, y / quality, z ) * quality;


					}

					quality *= 4

				}

				return data;

			}

			function getY( x, z ) {

				return ~~( data[ x + z * worldWidth ] * 0.2 );

			}

			function onDocumentMouseDown( event ) {

				event.preventDefault();
				event.stopPropagation();

				switch ( event.button ) {

					case 0: moveForward = true; break;
					case 2: moveBackward = true; break;

				}

			}

			function onDocumentMouseUp( event ) {

				event.preventDefault();
				event.stopPropagation();

				switch ( event.button ) {

					case 0: moveForward = false; break;
					case 2: moveBackward = false; break;

				}

			}

			function onDocumentMouseMove(event) {

				mouseX = event.clientX - windowHalfX;
				mouseY = event.clientY - windowHalfY;

			}

			function onDocumentKeyDown( event ) {

				switch( event.keyCode ) {

					case 38: /*↑*/ moveForward = true; break;
					case 40: /*↓*/ moveBackward = true; break;

					case 87: /*W*/ moveForward = true; break;
					case 83: /*S*/ moveBackward = true; break;

				}

			}

			function onDocumentKeyUp( event ) {

				switch( event.keyCode ) {

					case 38: /*↑*/ moveForward = false; break;
					case 40: /*↓*/ moveBackward = false; break;

					case 87: /*W*/ moveForward = false; break;
					case 83: /*S*/ moveBackward = false; break;

				}

			}

			function loop() {

				if ( moveForward ) camera.translateZ( - 15 );
				if ( moveBackward ) camera.translateZ( 15 );

				lon += mouseX * 0.005;
				lat -= mouseY * 0.005;

				lat = Math.max( - 85, Math.min( 85, lat ) );
				phi = ( 90 - lat ) * Math.PI / 180;
				theta = lon * Math.PI / 180;

				camera.target.position.x = 100 * Math.sin( phi ) * Math.cos( theta ) + camera.position.x;
				camera.target.position.y = 100 * Math.cos( phi ) + camera.position.y;
				camera.target.position.z = 100 * Math.sin( phi ) * Math.sin( theta ) + camera.position.z;

				renderer.render(scene, camera);
				stats.update();

			}

		</script>

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